Remote Photoacoustic Sensing Using Single Speckle Analysis by an Ultra-Fast Four Quadrant Photo-Detector
Lengenfelder B, Hohmann M, Späth M, Scherbaum D, Weiß M, Rupitsch S, Schmidt M, Zalevsky Z, Klämpfl F (2021)
Publication Language: English
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 21
Journal Issue: 6
DOI: 10.3390/s21062109
Open Access Link: https://www.mdpi.com/1424-8220/21/6/2109
Abstract
The need for tissue contact makes photoacoustic imaging not applicable for special medical applications like wound imaging, endoscopy, or laser surgery. An easy, stable, and contact-free sensing technique might thus help to broaden the applications of the medical imaging modality. In this work, it is demonstrated for the first time that remote photoacoustic sensing by speckle analysis can be performed in the MHz sampling range by tracking a single speckle using a four quadrant photo-detector. A single speckle, which is created by self-interference of surface back-reflection, is temporally analyzed using this photo-detector. Phantoms and skin samples are measured in transmission and reflection mode. The potential for miniaturization for endoscopic application is demonstrated by fiber bundle measurements. In addition, sensing parameters are discussed. Photoacoustic sensing in the MHz sampling range by single speckle analysis with the four quadrant detector is successfully demonstrated. Furthermore, the endoscopic applicability is proven, and the sensing parameters are convenient for photoacoustic sensing. It can be concluded that a single speckle contains all the relevant information for remote photoacoustic signal detection. Single speckle sensing is therefore an easy, robust, contact-free photoacoustic detection technique and holds the potential for economical, ultra-fast photoacoustic sensing. The new detection technique might thus help to broaden the field of photoacoustic imaging applications in the future.
Authors with CRIS profile
Benjamin Lengenfelder
Lehrstuhl für Photonische Technologien (LPT)
Martin Hohmann
Lehrstuhl für Photonische Technologien (LPT)
Moritz Späth
Lehrstuhl für Photonische Technologien (LPT)
Daniel Scherbaum
Lehrstuhl für Photonische Technologien (LPT)
Manuel Weiß
Technische Fakultät
Stefan Rupitsch
Technische Fakultät
Michael Schmidt
Lehrstuhl für Photonische Technologien (LPT)
Florian Klämpfl
Lehrstuhl für Photonische Technologien (LPT)
Additional Organisation(s)
Involved external institutions
Israel (IL)How to cite
APA:
Lengenfelder, B., Hohmann, M., Späth, M., Scherbaum, D., Weiß, M., Rupitsch, S.,... Klämpfl, F. (2021). Remote Photoacoustic Sensing Using Single Speckle Analysis by an Ultra-Fast Four Quadrant Photo-Detector. Sensors, 21(6). https://doi.org/10.3390/s21062109
MLA:
Lengenfelder, Benjamin, et al. "Remote Photoacoustic Sensing Using Single Speckle Analysis by an Ultra-Fast Four Quadrant Photo-Detector." Sensors 21.6 (2021).
BibTeX: Download